Improved measurements of thermally induced birefringence effects in a laser material using a half-wave plate |
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Authors: | Duck-Lae Kim Byung-Tai Kim |
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Institution: | a EO/IR R&D Center, LIG Nex1, Yongin-City 446-912, Republic of Koreab Department of Laser & Optical Information Engineering, Cheongju University, Cheongju 360-764, Republic of Korea |
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Abstract: | The polarization dependence of a probe beam for use in measuring thermally induced birefringence effects in a laser-diode end-pumped Nd:YAG ceramic laser has been investigated. The variation in intensity of the probe beam was found to be 10.2% for a linearly polarized probe beam, 20.6% for a circularly polarized probe beam, and 31.4% for a circularly polarized probe beam using a half-wave plate with a pump power of 12 W. The angle between the analyzer and the inclination of the major axis of the elliptical polarization with respect to the x axis was controlled using a half-wave plate. By combining a half-wave plate with a circularly polarized probe beam, the variation in intensity increased compared with conventional methods. |
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Keywords: | Thermal effects Laser materials Birefringence |
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